The ACT Reference Catalog

Details The ACT Reference Catalog The ACT Reference Catalog

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.5707u&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #57.07; Bulletin of the American Astronomical Society, Vol. 29, p.1306

Astronomy and Astrophysics

Astronomy

3

Scientific paper

The U.S. Naval Observatory has completed the compilation of the ACT Reference Catalog, containing 988,758 stars covering the entire sky. The motivation behind the ACT was to provide accurate proper motions for the majority of the stars in the Tycho Catalogue (ESA SP-1200). To do this, positions from new reductions of the Astrographic Catalogue (AC 2000) were combined with those of the Tycho Catalogue. The large epoch span between the two catalogs yields proper motions about an order of magnitude more accurate than those found in the Tycho Catalogue. The astrometric data contained in the ACT Reference Catalog include positions, proper motions and error estimates. These are on the Hipparcos System (J2000.0) for epoch J2000.0. Photometric data (B and V) from Tycho are included. Additionally, cross references to the Tycho, AC 2000, Bonner Durchmusterung (BD), Cordoba Durchmusterung (CD), Cape Durchmusterung (CpD), Henry Draper (HD) and Hipparcos Catalogues are given. This paper discusses some of the catalog characteristics and how to obtain the data.

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